{
  "@context": [
    "https://schema.org",
    {
      "ec": "https://entitycodes.org/vocab#"
    }
  ],
  "@type": "DefinedTerm",
  "@id": "https://entitycodes.org/naics/333994/",
  "identifier": "333994",
  "name": "Industrial Process Furnace and Oven Manufacturing",
  "description": "This U.S. industry comprises establishments primarily engaged in manufacturing industrial process ovens, induction and dielectric heating equipment, and kilns (except cement, chemical, wood).  Included in this industry are establishments manufacturing laboratory furnaces and ovens.",
  "url": "https://entitycodes.org/naics/333994/",
  "inDefinedTermSet": {
    "@type": "DefinedTermSet",
    "name": "NAICS 2022",
    "url": "https://entitycodes.org/naics/"
  },
  "sameAs": [
    "https://www.census.gov/naics/?input=333994&year=2022"
  ],
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "SBA size standard",
      "value": "500 employees",
      "unitText": "employees",
      "description": "13 CFR 121.201, as-of 2023-03-17"
    },
    {
      "@type": "PropertyValue",
      "name": "IRS PBA code",
      "value": "333900",
      "description": "IRS Principal Business Activity code (method: rolled-up)"
    },
    {
      "@type": "PropertyValue",
      "name": "US establishments",
      "value": 319,
      "description": "Census County Business Patterns 2023"
    }
  ],
  "ec:crosswalk": [
    {
      "system": "SIC 1987",
      "code": "2599",
      "title": "Furniture and Fixtures, NEC",
      "confidence": "chain",
      "via": "SIC1987:2599\u2192NAICS1997:339111\u21922002:339111\u21922007:333994\u21922012:333994\u21922017:333994\u21922022:333994",
      "url": "https://entitycodes.org/sic/2599/"
    },
    {
      "system": "SIC 1987",
      "code": "3567",
      "title": "Industrial Process Furnaces and Ovens",
      "confidence": "chain",
      "via": "SIC1987:3567\u2192NAICS1997:333994\u21922002:333994\u21922007:333994\u21922012:333994\u21922017:333994\u21922022:333994",
      "url": "https://entitycodes.org/sic/3567/"
    },
    {
      "system": "SIC 1987",
      "code": "3821",
      "title": "Laboratory Apparatus and Furniture",
      "confidence": "chain",
      "via": "SIC1987:3821\u2192NAICS1997:339111\u21922002:339111\u21922007:333994\u21922012:333994\u21922017:333994\u21922022:333994",
      "url": "https://entitycodes.org/sic/3821/"
    },
    {
      "system": "SIC 1987",
      "code": "3841",
      "title": "Surgical and Medical Instruments and Apparatus",
      "confidence": "chain",
      "via": "SIC1987:3841\u2192NAICS1997:339111\u21922002:339111\u21922007:333994\u21922012:333994\u21922017:333994\u21922022:333994",
      "url": "https://entitycodes.org/sic/3841/"
    }
  ],
  "ec:provenance": {
    "definition": {
      "source": "US Census 2022 NAICS Manual",
      "type": "US gov \u2014 public domain"
    },
    "crosswalk": {
      "source": "Census NAICS\u2194SIC concordance",
      "method": "transitive chain (NOT direct)"
    },
    "sba_size_standard": {
      "source": "SBA Table of Size Standards (13 CFR 121.201)",
      "as_of": "2023-03-17"
    },
    "establishments": {
      "source": "Census County Business Patterns",
      "year": 2023
    }
  },
  "license": "https://www.usa.gov/government-works",
  "dateModified": "2026-07-21",
  "isPartOf": {
    "@type": "DefinedTerm",
    "identifier": "3339",
    "name": "Other General Purpose Machinery Manufacturing",
    "@id": "https://entitycodes.org/naics/3339/"
  }
}